Table 3.

Main effect of group in the local strength

Regions	HC	De novo PD	t value	P value (FDR‐corrected)	Cohen's d
Right putamen	1.12 (0.21)	0.89 (0.21)	t (49) = 3.76	0.022	1.07
Left putamen	1.22 (0.26)	0.97 (0.22)	t (49) = 3.56	0.022	1.02
Right lingual	1.15 (0.28)	0.89 (0.22)	t (49) = 3.58	0.022	1.02
Right amygdala	0.28 (0.07)	0.21 (0.06)	t (49) = 3.51	0.022	1.00

De novo PD patients displayed a reduced strength in the bilateral putamen, in the right lingual gyrus and in the right amygdala. Data are expressed as mean (SD). T‐values were obtained from 2‐sample t‐test. Subscripted numbers in parentheses represent the degree of freedom. A FDR's procedure was applied to correct for multiple comparisons. HC, healthy controls; De novo PD, de novo PD patients; SD, standard deviation.